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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 98, No. 4, 2003, pp. 569-571
Bioline Code: oc03123
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 98, No. 4, 2003, pp. 569-571

 en SHORT COMMUNICATION - Larvicidal Activity of the Essential Oil from Lippia sidoides check for this species in other resources Cham. against Aedes aegypti check for this species in other resources Linn.
Ana Fontenele Urano Carvalho; Vânia Maria Maciel Melo; Afrânio Aragão Craveiro; Maria Iracema Lacerda Machado; Márcia Braga Bantim & Emanuelle Fontenele Rabelo

Abstract

The aim of this work was to study the larvicidal activity of Lippia sidoides check for this species in other resources essential oil against Aedes aegypti check for this species in other resources larvae. The essential oil and its hydrolate (saturated solution of essential oil in water) were obtained by vapor extraction and their chemical composition determined by GL-chromatography coupled to mass spectroscopy. Bioassays were run with the essential oil, pure and diluted hydrolate and with their main constituents thymol and carvacrol. The results obtained showed that L. sidoides essential oil and its hydrolate have larvicidal action against the mosquito A. aegypti, causing an almost instantaneous mortality. Thymol, an alkylated phenol derivative and one of the major components of L. sidoides essential oil, was identified as the active principle responsible for the larvicidal action, causing 100% larval mortality at the lowest tested concentration of 0.017% (w/v). These results suggest that the essential oil of L. sidoides is promising as larvicide against A. aegypti and could be useful in the search of newer, more selective, and biodegradable larvicidal natural compounds to be used in official combat programs and at home.

Keywords
Lippia sidoides check for this species in other resources - larvicidal activity - thymol

 
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